 /*******************************************************************************
  * Copyright (c) 2004, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/

 package org.eclipse.ui.internal.handlers;

 import org.eclipse.core.commands.ExecutionEvent;
 import org.eclipse.core.commands.ExecutionException;
 import org.eclipse.jface.action.IAction;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.ui.IWorkbenchWindow;

 /**
  * A handler that can be used to imitate a IWorkbenchWindowActionDelegate.
  *
  * @since 3.1
  */
 public abstract class WorkbenchWindowHandlerDelegate extends
         ExecutableExtensionHandler implements IWorkbenchWindowHandlerDelegate {

     /**
      * By default, this will do nothing. Subclasses may override.
      *
      * @param window
      * the window that provides the context for this delegate
      * @see org.eclipse.ui.IWorkbenchWindowActionDelegate#init(IWorkbenchWindow)
      */
     public void init(final IWorkbenchWindow window) {
         // Do nothing by default.
 }

     /**
      * This simply calls execute with a <code>null</code> map of parameter
      * values. If an <code>ExecutionException</code> occurs, then this should
      * be handle somehow. It's not clear what we'll do yet.
      *
      * @param action
      * The action proxy that handles the presentation portion of the
      * action
      * @see org.eclipse.ui.IActionDelegate#run(IAction)
      */
     public void run(final IAction action) {
         try {
             execute(new ExecutionEvent());
         } catch (final ExecutionException e) {
             // TODO Do something meaningful and poignant.
 }
     }

     /**
      * By default, this will do nothing. Subclasses may override.
      *
      * @param action
      * The action proxy that handles presentation portion of the
      * action
      * @param selection
      * The current selection, or <code>null</code> if there is no
      * selection.
      *
      * @see org.eclipse.ui.IActionDelegate#selectionChanged(IAction, ISelection)
      */
     public void selectionChanged(IAction action, ISelection selection) {
         // Do nothing be default.
 }
 }

